Where does the partly-digested food (in liquid form) go after it leaves the stomach?

Correct Answer: C

Rationale: Partly-digested food (chyme) moves from the stomach to the small intestine for further digestion and absorption, making C correct. The gullet is before the stomach, the appendix is a side structure, and the large intestine follows the small intestine.

Correct Answer: D

Rationale: Low stomach pH converts pepsinogen to active pepsin for protein digestion, making D correct.

Correct Answer: A

Rationale: The gallbladder stores bile for fat digestion, making A correct.

Correct Answer: B

Rationale: Villi, folds, and length increase digestive surface area, making B correct.

Correct Answer: A

Rationale: Water is a reactant in hydrolysis reactions during digestion, making A correct.